Ending today, Newegg offers the Seagate 4TB Expansion USB 3.0 External Hard Drive, model no. STBV4000100, for $139.99. Coupon code "EMCYTZG697" drops it to $129.99. With free shipping, that's the lowest total price we could find by $5, although it was $10 less last week (since expired). Deal ends July 24.